Hoist for dumping trucks



s u U mm m 0 P w D M R .0 H F .n m H Dec. 1, 1925.

4 Sheets-Sheet 1 Filed Feb. 21, 1924 Dec. 1, 1925.

w. H. MCCORMICK HOIST FOR DUMPING TRUCKS Filed Feb. 21, 15524 4 Sheets-Sheet 2 Dec. 1, 1925.

w. H. MCCORMICK HOIST FOR DUMPING TRUCKS Filed Feb. 21, 1924 4 Sheets-Sheet 3 Inventor.-

Dec. 1, 1925. 1,563,640

W. H. M CORMICK HOIST FOR DUMPING TRUCKS Filed Feb. 21, 1,924 4 Sheets-Sheet 4 E] El Inven (or: jkZZZczce/Y/(cCmvnz'c/ Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE.

HOIST FOR DUMPING TRUCKS.

Application filed February 2 1, 1924. Serial No. 694,213.

I! '0 all whom it may concern:

Belt known that I, ALLAOE H. McCon- MICK, a citizen of the United States, and resident of Streator, county of La Salle, and State of Illinois, have invented certain new and useful Improvements in Hoists for Dumping Trucks, of which the followin is a specification, andwhich are illustrated in the accompanying drawings, forming a part thereof. p I

This invention relates to hoisting devices, and more particularly to hoisting devices for dumbing trucks and the like.

One of the objects of the invention is the provision of an attachment for trucks that is provided with new and improved power multiplying body hoisting and lowering mechanism. 1

Another object of the invention is the provision of new and improved hoisting mech anism together with means for removably mounting the same on the chassis frame of a vehicle.

Other objects of the invention are the provision of a new and improved hoisting device that is simple in construction, cheap to manufacture, readily assembled, efficient and powerful in Operation, easily manipulated, and that is not likely to become broken or get out of order.

other and further objects and-advantages of the invention will appear from the following description, taken in connection with the accompanying drawings, in which Fig. 1 is a side elevation of a dumping truck, with parts broken away Fig. 2-is a section on line 2-2 of Fig. 1

Fig. 3 is a section on line 3-3 of Fig. 1, with parts omitted;

Fig. 4 is a section on line 4-4 of Fig. 5;

Fig. 5 is a section on line 55 of Fig.4;

Fig. 6 is a perspective view of the supporting member;

Fig. 7 is a perspective view of one of the attaching members to which the hoisting chain or cable is attached; 1

Fig. 8 is a perspective view of a latch for holding the gears in mesh;

Fig. 9 is a modified form means for the device; i s Fig. 10 is a section on line 1010 of Fig.

9;and

' Figs. 11 and 12 show a still further modified form offattaching means.

On the drawing the reference character designates motor truckprovided with of attaching chassis frame 11, wheels 12 and cab 13, as is usual in such constructions. The body 14, provided with longitudinal sills or supportmg members .15, is pivotally mounted at its rear end, as at 16, to the chassis frame 11.

The sills 15 may, if desired, be so arranged that they will engage and be supported directly by the side members of the chassis frame 11.

Since the details of. the truck form no part of the present invention the same is not shown and will not be further described.

Suitable means are provided for elevating or hoisting the front or free end of the body 14. Preferably this means is so constructed that it constitutes a unitary structure that may be attached to or detached from the truck and is provided with means whereby the same may be adjustably' connected to any suitable dumpin truck.

As shown, the hoisting attachment comprises a channel or U-shaped support 17 which is provided with slots 18 in its base portion at each end thereof, whereby the same may be attached to the flanges 19 of the chassis frame 11. as by means of the bolts 20, see Figs. 3 and 6. 4

The support 17 may also be provided with a slot 21 which permits the escape of dirt and other foreign matter from said support.

Mounted in the ends of the support 17 are the two part bearings 22 and 23 in which are adapted to be journaled the reduced ends of the drum or winding shaft 24. The lower portions 25 and 26 of these bearings are adapted to fit the channel of the support 17 and are adapted to be secured thereto by bolts 27 which also secure the upper portions 28 and 29 of the hearings in proper position. I

The support is also provided with a suitable mast 30 which comprises the standards 31 and the upper cross members 32. The brace members 33 may, if desired, be also employed.

In order to relieve the mast from unnecessary strain, the same is preferably plvotally mounted. As shown,.the lower ends-of the standards 31 are provided with the hinge members 34. The hinge members,,34 ;ajre preferably provided with ledges 35 on which the standards 31 are adapted to be supported. The standards as .shown are in the form of angle bars, but it is understood that they may be of any other suitable form.

The hinge members 34 are connected to nit he ie the standards 31 by rivets or any other suitable fastening means. 34 are adapted to be pivotally mounted on the reduced ends of the drum or winding shaft 2a, as clearly shown in Fig. 4;. In order to take the end thrusts the lower portions 25 and 26 of the journals 22 and 23 are provided with extensionsfihhaving con cave upper surfaces that form bearings for the lower ends of the inen bers .84.

I The members are providedwith shoulders 37 which are adapted to engage corresponding, shoulders on theextensions 36 .for limiting .the .forward pivotal .inoveinent of the standards 31. The shoulders 37 may .also engage the forward-flange of the support 17, as shown in Fig. 12. PulleyslSSare journaled on the cross nernbers32a1id are adaptedto have trained oveiithe sanie, flexible qmelnbers Such as ,the chains 39, "one 'end of each of which isconnected'to the winding shaft or ,drum 24 as at 2 .0. The other I ends of the chains are secured to the attaching inelnber il carried by the front ends of the sills -15 of.the body la. .Theattaching menibersetl are provided with offsets 4-2 where- .by ,the chains will hang .in vertical .planes and be prevented tron; coming in ,contact with the standa rds3 1 during the raising and lowering ofthe vehicle lbody. i i

Suitable inean sare provided foivrotating the drum 24 forwinding up the ,chains BQ. Preferably power ,inultiplying gears are employed for this purpose. As .shown, one vend of the drum 24: has rigidly nounted ,thereon the gear 523. They gear d3 is operatedby the pinion {hiwhich is rigidly connected .to the gear The .pinion l and gear eLSare supported in any suitable. manner. Asshown, the bearing 26 is provided with theflange d6 to which theplate 47 is adaptedto be secured, as by means of the bolts 528 and {1. 9, see Figs. 4c and 5. These bolts .are provided with spacing sleeves and the pinion dfiand gear i5 are journaled ona,the sleeve on the bolt a8. 7

The gear a5 is'adapted .to be rotatedby means of the pinion 51 which istrigidly mounted ,on the stub shaft v 52, ,one .end of which is .iournaled ,in theydnuin 2{ t.and the other end of which eateinls'tln'ough a bracket extension 53 of the .pla'tel'k l'fi The ,o11te'1' end of the shaft is 'provided'with vratchet .5 which is a .dapt ed ,to be engaged tyne pawl 55 11' ntegral .withflor' rigidly seam d ,to the crank .56. 57 ema etee'poa e erank SG .prpiidd 1th a;slo 5,8 thr ugh -ahich thB- 1151f ll The hinge members rotate'during this operation.

cab 13 for engaging the crank56 forholding the "same in inoperative position against the pressure of the spring 59.

In order to facilitatethe lowering of the body andavoid accidents during the lowering operation, it is desirable that means be provided whereby the stub shaft will not As shown the shaft 52 is slidable longitudinally of its axis. The pinion .51 is held in mesh with the gear 45 by means oft-he pivoted latchG3 which is provided with 0. depending portion 64. adapted to engage the 'boss on said pinion. The pinion 51 may be disengaged from the gearid-fiby elevatingthe latch 63 and n1oving the stub shaft'outwardly. The eXtensiono'fthe shaft tenor such lengththat it will not become disengaged "from the drum 2%]: when the boss 65 is drawn outwardly against the bracket 5-3. "Suitable means are provided for controlling the descent of the truck body. As shown; a brake is employed ifornthis purpose. The ,brakeinay beintheforin 01? a band 66 secured at one endtoone of the bolts 49 and having its other end secured to a lever The lever 67 is provided with a hinged e):- teiision orhandle 68 foroperating the brake. The extension isadapted toswing down out oftlie path of the crank 56. V

A pawl 69 is adapted to engage the teeth of the pinion for holding the body at any desired elevation. The pawl is held in operative position by a suitable spring 71. The pawl is so constructed that it will ride over the teeth of the gear 45 during the elevation of the .body 1st. The pawl is released by theniernbcr 72 which is connected to the lever 67 in such a manner that when ,the pawl is released the brake is applied.

. Suitable IHGLUISTLI'G provided for protecting the gearing from dust and other foreign matter. As shown the upper section 29 of the bearing QB is provided with a flange to which is secured the curved shield 75, .which extends over said gearing. The shield 75 inay be provided .with a flange T6 at its outer end.

The forward ends 01 the sills 15 are provided with concave notches T 8 which are adapted to afford clearance for the drum 24- whereby theffront part of "the body when in lowered pos tion isadjacent to the cab i In Figs." 9 and 10 is shown a nodilied for nof attachingthe s upport ;17 to the chassis frame 11. In this construction s antin v etes 3 we empl yed r this purpose The supports ere clamped a e inst trains 11 by :meansd suitable bolts 24., those on the outside of 'the fran e :heing t 1. 91s ismsin h 1011.

LLU

taching members 77 which are secured to the support by bolts which adjustably engage the slots 18 in said support. The free ends of the attaching members 77 are adapted to conform to the channel of the side members of the frame and are secured thereto by any suitable means. In order not to weaken the chassis frame the fastening means preferably extends through openings in the neutral axis of the longitudinal frame members.

In the operation of the device, when the body is in lowered position and it is desired to dump the same, the crank 56 is released from the catch 62 and the same is slid inward until the pawl engages the ratchet 5%, after which the crank may be turned to rotate the drum 24 for winding up the chains 39 to elevate the front end of the body. If the load be heavy the crank 56 may be oscillated from the position most convenient for the operator. The pawl. 69 will hold the drum in any position to which it may be turned. lVhen it is desired to lower the body, the latch 63 is turned upward and the crank 56, together with the stub-shaft 52 are moved outward disengaging the pinion 51 from the gear 45. The handle or extension 68 is moved upward to operate the lever 67 for elevating the pawl 69 and applying the' brake band 66 to the periphery of the gear as for controlling the descent of the body 14 which is accomplished by the force of gravity.

It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of my device will be apparent to those skilled in the art, and that various changes in size, shape, proportion and details of construction may be made without departing from the spirit and scope of the appended claims. v

I claim as my invention:

1. An attachment for motor vehicles comprising a support having an upwardly extending flange, means for securing said support to a vehicle, a drum mounted on said support, mast pivotally mounted 011 said drum and having a shoulder for engaging said flange for limiting the pivotal movement of said mast in one direction, a pulley at the upper end of said mast, a flexible member trained about said pulley and having one end secured to said drum, and means for rotating said drum.

2. A, unitary attachment for dumping trucks comprising a U-shaped support, bearings secured in said support, a winding drum journaled in said bearings, extensions on said bearings, a mast comprising arms pivoted to said drum, and shoulders 011 said arms for engaging said extensions for limiting the pivotal. movement of said arms.

3. A hoisting mechanism for dumping vehicles comprising body elevating mechanism, including a winding drum, means for operating said mechanism comprising a series of power multiplying gears connected to said drum, a stub shaft having one end slidably journaled in said drum, a pinion 011 said shaft for diving said gears, meansfor releasably holding said pinion in mesh with one of said gears, and a crank for rotating said stub shaft.

4:. A hoist for dumping trucks comprising a body elevating mechanism including a winding drum, a train of gears for rotating said drum, a stub shaft having its inner end slidably mounted in one end of said drum, a pinion keyed to said shaft and adapted to drive said train of gears, a latch for holding said pinion in operative position, a pawl for engaging said train of gears to prevent back ward rotation of the same, a brake for said train of gears, and a sectional lever for sin'iultaneously operating said pawl and brake.

5. A hoist for vehicles comprising body elevating mechanism including a drum, a train of gears for operating said drum, means including a crank for operating said gears, means whereby said crank may be moved laterally to inoperative position, a pawl and brakefor engaging certain of said gears, and an extension lever for simultaneously operating said pawl and brake for permitting backward rotation of said drum when said crank is moved to inoperative position and for controlling said rotation.

"WALLACE H. MCCORMICK. 

